CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenues	$ 42,801,745	$ 31,329,468	$ 80,439,538	$ 51,388,265
Operating costs and expenses:
Sales and marketing	7,753,486	4,599,842	14,801,479	9,705,350
Product development and content	24,411,288	16,526,905	46,512,825	24,984,399
General and administrative	5,154,103	5,160,799	10,623,281	8,023,226
Depreciation and amortization	3,505,180	2,965,175	7,134,783	4,650,014
Acquisition and restructuring	1,036,602	3,769,425	4,386,553	5,269,854
Total operating costs and expenses	41,860,659	33,022,146	83,458,921	52,632,843
Income (loss) from operations	941,086	(1,692,678)	(3,019,383)	(1,244,578)
Other income (expense):
Interest income	2,742	1,400	9,950	3,970
Interest expense	(671,294)	(175,254)	(1,278,980)	(177,586)
Gain (loss) on foreign currency transactions	4,216	(9,229)	107,259	(11,429)
Other	28,571	0	21,627	0
Total other expense	(635,765)	(183,083)	(1,140,144)	(185,045)
Income (loss) before income tax benefit	305,321	(1,875,761)	(4,159,527)	(1,429,623)
Income tax benefit (expense)	(540,593)	2,732,356	(288,406)	2,732,064
Net income (loss)	$ (235,272)	$ 856,595	$ (4,447,933)	$ 1,302,441
Basic and diluted net income (loss) per common stockholder:
Basic net income (loss) per common stockholder (in dollars per share)	$ 0.00	$ 0.01	$ (0.06)	$ 0.02
Diluted net income (loss) per common stockholder (in dollars per share)	$ 0.00	$ 0.01	$ (0.06)	$ 0.02
Weighted average shares outstanding:
Basic (in shares)	72,753,487	70,122,234	72,369,619	65,632,962
Diluted (in shares)	72,753,487	74,885,903	72,369,619	70,569,243
Comprehensive income (loss):
Net income (loss)	$ (235,272)	$ 856,595	$ (4,447,933)	$ 1,302,441
Other comprehensive income (loss):
Reclassification of losses on derivative financial instruments, net of tax benefit of $832,995, $—, $508,691 and $—	(1,831,921)	0	(1,053,778)	0
Unrealized gains on derivative financial instruments, net of tax expense of $834,099, $—, $416,203 and $—	1,858,182	0	1,097,056	0
Foreign currency translation adjustment	(952,438)	0	(584,085)	0
Other comprehensive income (loss)	(926,177)	0	(540,807)	0
Comprehensive income (loss)	$ (1,161,449)	$ 856,595	$ (4,988,740)	$ 1,302,441